Technique overview
Complete guide to techniques supported by Badmi
Badmi currently analyzes seven recorded techniques: forehand smash, forehand clear, forehand drop, serve, net shot, drive, and ready stance. Six stroke analyses focus on contact, while ready stance reads a stable posture; each technique has its own rules, recording window, and capability limits.
Learn what Badmi analyzes for the forehand smash, clear, drop, serve, net shot, drive, and ready stance; how to film each one; and what a report cannot establish.
- Author:
- Badmi Editorial
- Published:
- Sep 2, 2026
- Updated:
- Sep 2, 2026
- Reviewed:
- Badmi Editorial · Sep 2, 2026
With automatic detection, Badmi first identifies the target technique in the clip; you can also select it before recording. For strokes, keep one athlete in frame and perform 3–5 repetitions of the same action with a natural reset between each one. Badmi checks video quality, locates each valid contact, combines the measurements, then returns up to three persistent structured findings.
What each technique analyzes
| Technique | Main signals | Possible findings |
|---|---|---|
| Forehand smash | Contact height relative to shoulder, elbow angle, and knee extension at contact | Contact too low, elbow not extended, insufficient leg drive |
| Forehand clear | Overhead contact height, arm extension, and lower-body drive | Contact too low, elbow not extended, insufficient leg drive |
| Forehand drop | Overhead contact height and arm extension, preserving an overhead preparation | Contact too low, elbow not extended |
| Serve | Contact height, arm extension through contact, and weight transfer from the legs | Contact too low, elbow not extended, insufficient leg drive |
| Net shot | Net contact height, elbow stiffness, and lower-body readiness | Contact too high, elbow too locked, knees too straight |
| Drive | Whether contact stays near shoulder level, arm extension, and leg support | Contact off center, elbow not extended, insufficient support |
| Ready stance | Stance width, knee-drop ratio, and torso offset over the base of support | Stance too narrow or wide, knees too straight, torso off center |
Choose the setup for the action
| Action group | Recommended view | Suggested clip |
|---|---|---|
| Smash / clear / drop | True racket-side profile, about 4–6 m away at hip height | 3–5 repetitions of the same stroke, ideally 10–20 s and no more than 30 s, preferably 60 fps |
| Serve | Racket-side profile, about 3–5 m away between hip and chest height | 3–5 repetitions of the same serve, ideally 10–20 s and no more than 30 s, preferably 60 fps |
| Net shot | Slight racket-side angle, about 3–5 m away with lens just above net height | 3–5 repetitions of the same net shot, ideally 10–20 s and no more than 30 s; standard 30 fps is usable |
| Drive | True racket-side profile, about 4–6 m away at hip height | 3–5 repetitions of the same drive, ideally 10–20 s and no more than 30 s, preferably 60 fps |
| Ready stance | Straight in front of the athlete at hip height | Hold naturally for 3–5 s; standard video is enough |
Pre-recording checklist
- Mount the phone horizontally. Do not pan by hand during the action.
- Keep the head, both hands, and both feet visible; for strokes, leave room for the racket-hand peak.
- Fill roughly 60–80% of frame height and avoid occlusion by the net, bags, or other players.
- For strokes, perform 3–5 repetitions of the same target action with a natural reset; hold a ready stance steadily for 3–5 seconds.
- Review whether contact is clear before uploading. Prefer 60 fps for fast strokes.
Use the report in practice
Confirm the detected technique and filming warnings before reading metrics and findings. Choose one highest-priority issue, train one focused block, and record again from the same setup. Do not compare raw values across unrelated techniques: the useful contact height for a net shot is not the same as for a smash.